请教一个mount的问题

[weixin_38061608]

两台服务器在同一个局域网上。
我已经在两台服务器上作了相应的设置，但是还是报告错误，请问还要检查或者作什么？
I had shared /bigmouse in szserver01.
#share -F nfs -o root=szserver02 /bigmouse
And had changed szserver01:/etc/vfstab.
szserver02:/bigmouse            -                  /bigmouse nfs     -       yes     -
But when I mount szserver01:/bigmouse from szserver01.
It reported 'device busy'.
It means failed.

Did you know anything need do yet?